Horseman advancing right, holding a spear, "C/MH" below the horse / Inscription in 4 lines "TSAR I VELIKI KNYAZ IVAN VSEYA RUSY" ("Tsar and Grand Duke Ivan of all Russia"). 13mmx11mm, 0.70 grams. Pskov mint. Griszin #93; Russian Wire Coins #93.
This is a full kopeck (not a denga) The coin was minted in Pskov around 1540 when Ivan was still just a Grand Duke and not a Tsar.